Machine for making horseshoe toe-calks



(No Model.) 2 sheets-she t 1.

J. A TRUDEAU.

v MACHINE FOR MAKING HORSESHOE TOE OALKS. I

No. 537,249. Patented Apr 9, 1895.

2 Sheets-Sheet 2.

J. A TRUDEAU. MACHINE FOR MAKING HORSESHOE TOE GALKS..

(.No Model.)

' Patented Apr. 9, 1895.

UNITED STATES P TENT Orrrca.

JAMES A. TRUDEAU, OF BOSTON, ASSIGNOR OF ONE-THIRTIETH TO LOUIS B.CANTIN, OF EVERETT, MASSACHUSETTS.

MACHINE FOR MAKING HORSESHOE TO E-CALKS.

SPECIFICATION forming part of Letters Patent No. 537,249, dated April9,1895. Applicationflle September 28, 1894. Serial No. 524.371- (Nomodel.)

To all whom it may concern:

Be it known that I, JAMES A. TRUDEAU, of'

Boston, county of Suffolk,State of Massachus'etts, have invented anImprovement in Machines for Making Horseshoe Toe-Oalks, of

which the following description, inconnection with the accompanyingdrawings, is a specification, like letters and numerals on the drawingsrepresenting like parts.

The short piece of steel forming a toe calk experienced by blacksmithsin retaining them on the shoe before welding.

On all machine-made calks, so far as I am aware, the spur issubstantially conical in shape, with straight sides, and when driveninto the heated shoe, the opening made by such a spur is so shaped thatwhen the blacksmith places the shoe and calk in the fire to heat, thecalk will drop off, or it will fly off at the first hammer blow.Hand-made calks,

0 however, are provided with a slightly bent or turned spur, whichenters the shoe in a diagonal direction, and when the point of the spurimpinges against the anvil as it is driven into the shoe it is stillfarther turned or 5 clinched in the shoe, firmly retaining the calk inplace during heating and welding;

This invention has for its object the production of a machine for makingtoe calks having a spur Whose point is slightly ofiset or turned over,and which will have all the advantages of ahand-made calk, the machineembodying my invention being simple in construction, rapid andeconomical in operation, and automatically forming the calk from a 5strip of steel of proper shape.

In accordance therewith my invention consists, in a machine for makingtoe calks, of the following instrumentalities in combination, vizz-astationary anvil upon which the stock rests, a clamp to hold the stockthereon,

a co-operating anvil and die to act upon opposite sides of the stock andform the spur, and

a die movable in an adjustable path and adapted to travel over the outerside of the spur from base to point, substantially as will be described.

Other features of my invention will be hereinafter described andparticularly pointed out in the claims.

Figure 1 is a top view of a machine eni- 6o bodying therein my inventionfor making toe calks. 1 Figs 2 is a sectional view, partly broken out,taken on the line 00-30, 1, looking to the left. Fig. 3 is a detailtaken on the line so, Fig. 1. Fig. 4 is a similar view onthe line or-a5, Fig. 1. Fig. 5 is a diagrammatic view of the stock clamped ontheanvil,

and the spur-forming dies in position to advance' upon the stock. Fig. 6is adetail showing the spur-forming dies in engagement with the stock.Fig. 7 is a perspective view of a toe calk as made in accordanoewith myinvention. Fig. 8-is a similar view of a modified form of calk. Figs. 9and 10 are detail views of the clamp, and the forming dies respectively,for the calk shown in Fig. 8; and Fig. 11 is a side view of one of thecams, to be referred to.

In order that the product of the machine may be clearly understoodreference is first made to Fig. 7, showing a completed toe calk, themain portion or bar 0 having depending from one corner thereof atapering spur c, the outer face 0 of the spur'being convexed and itsinner face 0 concaved, between the 8 bar 0 and the spur point 0", tooffset the latter. The spur is thus bent initially, and when driven intothe heated shoe the point c will be turned by the anvil still farthertoward the concave side 0 and thus clinched upon the inner side of theshoe. Accidental separation of the call; from the shoe during subsequentoperations is thus rendered impossible, and furthermore, the clinchingof the spur holds the calk in proper position on the 5 shoe until it iswelded thereon.

As shown in Figs. 1 to 4 inclusive, the operating parts are supported ina suitably shaped frame A, having bearings A for the main or operatingshaft A said shaft having fast too thereon a gear A and fly wheelA andaloose sleeve upon which are rigidly mounted belt pulleys A and a smallgear A. The sleeve and gear A are adapted at times to be connected byany usual clutch device, forming no part of my invention, and whenclutched, the driving shaft A is rotated at the same speed as thesleeve. When it is desired to increase the power at the expense ofspeed, a countershaft A, mounted in bearings A adjust-able toward andfrom the main shaft, is moved toward said shaft A until the gears A andA respectively engage a small gear A and a large gear A both fast on thecountershaft, the beltpulleys A being unclutched from the main shaft.The power is then transmitted from the pulleys A through gears A A A andA to the main shaft A reducing the speed and making a back gearing forthe apparatus, no claim being herein made to the same, however, as it isnot of my invention.

A series of cams B, C, D, E and F are secured at intervals to the mainshaft A to actuate respectively the feed, clamping, spurforming andsevering devices, now to be described in their order.

A lever b longitudinally slotted to receive a removable bushing 12', seeFigs. 1 and 4, through which is extended its adjustable fulcrum D isprovided at one end with a roller or other stud b to be engaged by araised portion B on the side of the cam 13, the other end of the leverhaving a segmental toothed face a suitable spring 3 maintaining the rollb in engagementwith the cam. A raised guideway l) on the top of theframe-work A receives between its flanged lips the enlarged and headedend U of the fulcrum post b threaded to engage a set nut 1) adapted tobe screwed tightly upon the guideway b to hold the post b in adjustedposition. The post is reduced in diameter at 11 see Fig. 4, and extendedthrough the bushing b, which rests in the slot in the lever 11, the endsof the slot be ing stepped to hold the bushing in place, a washer w andset nut b retaining the lever and bushing upon the post 11 The lever 19operates the feed mechanism, and inasmuch as the length of feed varieswith the length of the bar 0 ,of the toe calk, it is necessary to varythe throw of thelever b, which is accomplished by inserting in the leverb a bushing having the post-receiving opening at the proper distancefrom its center, adjusting the post I) in the guideway b until it willenter the bushing, and then securing the washer to and nut b in place.It will be obvious that by using different bushings the fulcrum of thelever will be moved without disarranging the lever and its coopcratingparts.

The frame A has secured thereto or forming a part; of it an undercuttongue I) extended in the direction of feed, upon which a suitablygrooved block b is longitudinally movable, having upon its top and atone side an abutment Z2 to form one jaw of the feed mechanism, the otherjaw D forming a part of a sliding jaw-carrier Z1 movable in a transversegroove in the block b" and held in place by a tongue I). A series ofrack teeth I) on the jaw-carrier b are engaged by the segmental toothedend b of the actuating lever I). The inner faces of the jaws b ,b arepreferably corrugated or roughened, to better grip the stock S, betweenthem. As shown in Fig. 1, the segmental end 11 of the lever is so curvedthat when moved in the direction of the arrow the movable jaw Z1 will befirst moved toward the other jaw, gripping the stock S, and the movementof the leverb continning, the block b will be moved forward, carryingthe stock with it. to place its leading end in position to be acted uponby the forming or shaping dies. On the reverse movement, as soon as thepressure exerted by the lever on the jaw-carrier b is loosened, the jawsare separated by a strong spring 5, inserted between the jaw-carrier band the slide block b, in suitable recesses, shown only in Fig. 4. Aspring-controlled pin 1) held in the fixed jaw b projects from its innerface, and serves to effectually release the stock from engagement withthe serrated face of the jaw during the retrogression of the jawspreparatory to gripping the stock anew and again feeding it.

The bed of the frame-work A is grooved, see Fig. 2, to receive the anvilor support a for the leading end of the stock, while it is being shapedto form the spur of the toe calk,-

the end of the anvil a being convexed at a, as shown in Fig. 5, to shapethe concave side 0 of the spur.

The stock S is clamped from the time it, is fed forward by the devicesdescribed until the finished calk is severed therefrom by a suitablyshaped clamp-block a", held in one end of an arm n pivoted at c in asuitable standard, the other end of the lever having a roller or otherstud c thereon, held against the periphery of the cam C by a spring 8".

' In Fig. 2 the shape and relative position of the cam C is shown, thedwell occupying the greater portion of the periphery, as the clamp c isonly inoperative a very small portion of the entire cycle of operation.A rocker arm (1 is pivoted to the frame at d, and provided with alateral extension d having a roller stud d thereon, held in engagementwith a substantially elliptical cam D by a spring 3 to rock the arm dtwice at each revolution of the shaft A An ear or lug d on the rockerarm engages a roll d on the toe of a lever d, pivoted at (F, and havingremovably secured in its upper end, as by set screws 20, a setting dieor anvil (i to cooperate with a swaging die 01", shown in Figs. 2 and 5,removably held in the head of the rocker arm 61 by set screws 30.Adjusting screws and 35, see Figs. 1 and 2, adjust the anvil (Z and theswaging die d" respectively, according to the thickness of the stock.hen the rocker arm is moved in the direction of the arrow -10, Fig. 2,the lever ("Z is moved toward it, until the anvil d bears against oneside of the stock, as in Fig. 6, while the die (2* swages or forms thespur c. The die cl is cut away at d", Fig. 5, to form a clearance andleave an abutment c1 below which the face of the die is beveled at d,and provided with a lip 61 at itslower end, to limit the length of thespur, as shown in Fig. 6. The abutment d enters the side of the stock S,and draws down or swages the spur c between-its face d and the straightface of the anvil (1 after which the die and anvil are withdrawn fromthe stock. Immediatelya revoluble, cylindrical die e is brought againstthe end of the stock and rolled down over the outer side a of, the spurof the calk, thereby shaping the spur over the convexed portion a of theanvilot, and giving it its concave side 0 and slightlybent or offsetcondition. As soon as the revoluble die 6 is retracted, the die 01* andanvil d are again brough up to operative position, and'following theirseparation the die e is again operated, so that each call: is--subjectedto the swaging action of the dies twice, perfectly forming the spurthereon.

The revoluble die a is mounted on a lever E pivoted in a bearing 6,adjustably hinged to a standard a mounted rotatably on; the frame A andheld in place by a nut 6 see Fig. 2, the outer end of the lever having asuitable roller stud e resting against the periphery of the cam E and inthe groove E therein, the combined action of the groove and the camperiphery turning the lever E in its bearing 6' and also with the latterabout the vertical axis of the standard e thereby giving a convex formto the outer side of the spur of the calk. A roll a shown in Figs. '1'and 5, is mounted on the side of the lever E, to travel along anadjustable guide-track e pivoted to the frame at 6 and adjusted by asuitable bolt e and washer e, the shape of the.

track being such that it presentsa solid backing for the lever E whenits die e is in operation. The various adjustments described enable longor short spurs to be made, with different degrees of convexity for itsside 0 The call; having been properly shaped and swaged is now severedfrom the stock, by means of fixed and movable cuttersfand f, normally onopposite sides of the stock and held in place in suitable carriers f fby means of filling stripsf and clamp screws 1.

As shown in Fig. 1, the fixed cutterfbears against one side of thestock, and when the cutter f is moved toward it, it impinges against theopposite side of the stock and its full movement shears the main portionfrom the calk, and in order to bring the leading end back into positionto be fed forward I have secured to the movable carrier f a guide fhaving a notch in its under side, to loosely embrace or straddle thestock, see Figs. 1 and 2, whereby the stock is positively drawn backinto place by the retraction of the carrier f The sliding carrier isprovided with a tongue to enter an undercut groove f in the frame,

see Fig. 1, arms f and f secured to the carrier having rolls f thereonin engagement with the two like cams F on the shaft A whereby, when theraised portion Ffishown only in Fig. 11, of said cams engages the rollsf the carrier f is movedin the direction of the arrow 50, to sever thestock. By moving the cutters in their respective carriers the length ofthe calk is regulated, and the cut-v ters can readily be adjustedaccording to the thickness of the stock. The various cams are so setupon the main shaft thatthe co-operating mechanisms are moved in properorder, so that onefstep follows another in the operation of forming thecalk.

Instead of making the calks from stock rectangular in cross section,other shapes may be used, as for instance, triangular, a. completed calkmade from such stock being shown in Fig. 8. v

The bent spur m is shaped the same as heretofore described, with aconcave inner face m and it projects from one corner of the body m ofthe calk. Such a change in the stocks necessitates a change in the clampn, as shown in Fig. 9, and in the swaging die 0 and co-operating anvilp,the latter having an obtuse angled face 19', see Fig. 10, the point 0'of the die, formed by the clearance 0 entering the stock, and, inconjunction with the inclined face 0 shaping and drawing down the spurm. Thus by changing the faces of the various dies or parts directlyengaging the stock, it is obvious that any desired shape of stock may behandled with equal facility.

The operation of the various parts is direct and powerful, while theconstruction is simple, and all the parts are controlled by a singleoperating shaft, thecompleted calk being removed by the advancing end ofthe stock as it is fed forward.

It is to be understood that while the operating parts are actuatedby asingle shaft the latter is not of unusual size, for the reason that eachstep or act is performed by itself, so that the step requiring thegreatest power to accomplish it regulates the size of the shaft A Myinvention is not restricted to the construction and arrangement hereinshown, as it is obvious that alterations may be made therein withoutdeparting from the spirit and scope of my invention.

I claim- 1. In a machine for making toe calks, the followinginstrumentalities, in combination, viz;a stationary anvil upon which thestock rests,'a clamp to hold the stock thereon, a co-operating anvil anddie to act upon opposite sides of the stock and form the spur, and a diemovable in an adjustable path and adapted to travel over the outer sideof the spur from base to point, substantially as described.

2. In a machine for making toe calks, the

viz ;a stationary anvil upon which the stock rests, said anvil having aprojecting portion of its end convexed; an intermittingly mow able clampfor the stock; a movable anvil having its face corresponding to one sideof the stock; a co-operating die to act upon the opposite side of thestock and swage the spur; a die movable in an adjustable path andadapted to travel over the outer side of the spur, to force its innerside against the convexed part of the supporting anvil, and means toactuate said clamp and dies, substantially as described.

3. In a'machine for making toe calks, the following instrumentalities,in combinatipn, viz;-a slide block; a fixed jaw, and a jaw movablelaterally on said block to grip the stock between them; a vibratinglever movable in a horizontal plane to close the jaws and thereaftermove them longitudinally in unison with the slide block to feed thestock; a clamp; dies to act respectively upon one side and the end ofthe stock, to form the spur; co-operating cutters to sever the completedcalk; and means to operate said clamp, dies and cutters, substantiallyas described.

4. In a machine for making toe calks, the following instrumentalities,in combination, viz;a stationary supporting anvil for the stock; a clampto hold it thereon; a die and an anvil movable toward and to co-operatewith opposite sides of the stock, to swage the spur; a revoluble dieadapted to roll over the outer side of the spur; and means to adjust themovement of said die, substantially as described.

5. In a machine for making toe calks, the following instrumentalities,in combination, viz;'a stationary supporting anvil for the stock; aclamp to hold it thereon; dies to act upon the side and end of the stockto form the spur; a fixed cutter and a movable cutter located at therear of the clamp; means to adjust said cutters, toward or from theclamp 'and also relatively toward each other, and means to actuate themovable cutter; and an adjustable intermittingly operating feed device,to feed the stock a predetermined distance when unclamped, substantiallyas described.

6. In a machine for making toe calks, the following instrumentalities,in combination, viz;-asupportinganvil for the stock; aclamp to hold itthereon; dies to act upon the side and end of the stock to form thespur; a fixed cutter and a movable cutter located at the rear of theclamp; a guide to loosely engage the stock intermediate the cutters andfeed mechanism, and traveling in unison with said movable cutter, torestore the stock to proper position when out; and feed mechanism tofeed the stock forward a predetermined distance after the operation ofthe cut ters, substantially as described.

7. In a machine for making toe calks, the following instrumentalities,in combination,

viz;--two independent dies operating at an angle to each other; a fixedanvil supporting the stock and opposed to one die; a movable anvil toco-operate with the other die; aclamp; connections between said die andmovable anvil, whereby one actuates the other, and mechanism forwithdrawing the movable auvil and the connected die before the other dieis brought into operative position, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES A. TRUDEAU.

Witnesses:

J OHN C. EDWARDS, ALFRED PINEL.

